JPH0538126Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) The invention has been developed so that the chuck device of a steel pipe pile press-in/pull machine, which presses steel pipe piles into the ground and pulls them out, can handle piles other than steel pipe piles. This invention relates to an attachment for a chuck device for a steel pipe pile press-in/extraction machine that is compatible with the above.

(Conventional technology) When performing civil engineering works such as river bank protection work, bridges, or earth retaining, various types of piles are used to dam the river, change the flow path, or transport materials. Continuous pouring.

This pile includes, for example, a steel pipe pile P1, a U-shaped steel sheet pile P2, and an H-shaped steel sheet pile P, as shown in Fig. 7 a to c.
There are 3 etc. The same pile is not used for all of the same construction work, but each type of pile is used as appropriate depending on the flow velocity, water depth, hardness and softness of the ground, and other work site conditions, taking advantage of the characteristics of each type of pile.

That is, as shown in Fig. 7a and b, the steel pipe pile P1 and the U-beam P2 are combined, or as shown in Fig. 7c, the steel pipe pile P1 and the H-beam P3 are combined.
Or, all of the steel pipe pile P1, U-shaped steel sheet pile P2, and H-shaped steel P3 are combined.

On the other hand, the pile press-in/extraction machine that drives these piles is
As shown in FIG. 3, a mast 4 is erected on the upper surface of a slide base 3 that slides horizontally with respect to a base 2, and a chuck device 5 that clamps a pile P is vertically mounted on the mast 4. It is slidably mounted.
Then, the pile P is driven into the ground while being held at an appropriate position by the chuck device 5 and lowered. Repeat this process to press in the piles continuously.

(Problem that the invention aims to solve) As mentioned above, the piles are press-fitted one by one, so
If the type of pile changes during continuous pile press-in, the pile press-in/extraction machine must be replaced accordingly. This is because if the chuck device of the pile press-in/extraction machine is for clamping steel pipe piles, the chuck device cannot clamp U-shaped steel sheet piles or H-shaped steel. Furthermore, due to the structure of the pile press-in and pull-out machine, it was not possible to replace just the chuck device, so the pile press-in and pull-out machine itself had to be replaced.

Since the pile press-in/extraction machine is heavy, it must be replaced using a crane, etc., and this replacement work is complicated and time-consuming, and the use of a crane etc. increases construction costs. It was hot.

Therefore, the object of this invention is to provide an attachment for a chuck device of a steel pipe pile driving and extraction machine that can quickly and reliably accommodate various piles without having to replace the pile driving and extraction machine itself.

(Means for Solving the Problems) In order to achieve the above object, the chuck device attachment of the present invention is used in a steel pipe pile press-in/extraction machine equipped with a chuck device capable of clamping a steel pipe pile. The present invention is characterized in that the holder to be held is provided with an auxiliary chuck device capable of holding piles having shapes other than steel pipe piles.

(Function) With the holder of the attachment removed, the chuck device holds the steel pipe pile and drives it into the pile. Further, if the above-mentioned attachment holds a holder equipped with an auxiliary chuck device for holding a U-shaped steel sheet pile, the U-shaped steel sheet pile can be driven. Similarly, if a holder equipped with an auxiliary chuck device capable of holding an H-beam is held, the H-beam can be driven.

(Example) Hereinafter, the attachment for a chuck device of a steel pipe pile press-in/extraction machine of the present invention will be described based on the illustrated example.

First, the outline of the steel pipe pile press-in/extraction machine 1 will be explained based on FIGS. 1 to 3. A slide base 3 is provided on the top surface of the base 2 and is slidable horizontally (left and right in FIG. 2) with respect to the base 2, and a mast 4 is erected on the slide base 3. A chuck device 5 is attached to the front surface of the mast 4 and is slidable vertically with respect to the mast 4. Further, an appropriate number of clamps 6 are provided on the lower surface of the base 2, and the steel pipe pile press-in/extraction machine 1 is installed on the pile P by clamping the existing pile P with the clamps 6.

The chuck device 5 is for a substantially cylindrical steel pipe pile P1, and has a cylindrical portion 5 into which the steel pipe pile P1 can be inserted.
A suitable number of chucks 5b are provided on the inner circumferential surface of the shaft 5c, and the pistons 5c are movable in the radial direction by a piston 5c. When activated, the chuck 5b protrudes and clamps the steel pipe pile P1 from four directions.

Next, an embodiment of the chuck device attachment will be described based on FIG.

The first embodiment is shown in FIGS. 1a and 4, and is an attachment 10 for a U-shaped steel sheet pile P2.

The attachment 10 for U-shaped steel sheet piles is a steel pipe pile P.
A U-shaped steel sheet pile P1 is placed in a holder 11 having a diameter approximately equal to 1.
The insertion hole 12 is formed to have a substantially similar cross-sectional shape to the U-shaped steel sheet pile P1 so that the U-shaped steel sheet pile P1 can be inserted therethrough. A cylinder 13 is formed inside the holder 11 as an auxiliary chuck device, and a piston 14 slides within the cylinder 13. The tip of this piston 14 protrudes into the insertion hole 12, and the U-shaped steel sheet pile P2 existing in the insertion hole 12 is held between the tip surface of the piston 14 and the wall surface of the insertion hole 12.

The second embodiment is shown in FIGS. 1b and 4, and is an attachment 20 for H-section steel P3.
In this embodiment, an insertion hole 22 having a cross-sectional shape substantially similar to that of the H-section steel P3 is formed in the holder 21.
Further, a cylinder 23 as an auxiliary chuck device is formed in the holder 21, and a piston 24 inside this cylinder 23 slides. The tip of this piston 24 protrudes into the insertion hole 22, and the tip
It holds the shaped steel P3.

Next, the shape of the clamp will be explained.

What is shown in FIGS. 5a and 5b is a clamp 6 installed on the underside of the base 2 of the steel pipe pile press-in/extraction machine 1, which is used to fix the pile press-in/extraction machine 1 to the existing steel pipe pile P1. It is something.

This clamp 6 is constructed by dividing a cylindrical pressing member having an outer diameter smaller than the inner diameter of the steel pipe pile P1 into two parts, each of which is configured as a movable member 6a and a fixed member 6b. A pair of upper and lower cylinder accommodating holes 6c are bored at appropriate depths on opposing surfaces of the movable member 6a and fixed member 6b, and a cylinder 6d is slidably accommodated in each cylinder accommodating hole 6c.

This clamp 6 is inserted into the upper end of the existing pile P1, and the cylinder 6d between the movable member 6a and the fixed member 6b is actuated as shown in FIG. The steel pipe pile P1 is gripped by being pressed against the inner wall surface of the pile P.

In addition, FIG. 6 shows an auxiliary clamp 7, which is used to connect the steel pipe pile press-in/extraction machine 1
Used when fixing on top. A clamp 6 for fixing to the steel pipe pile P1 is attached to the pile press-in/extraction machine 1 itself.
2 or H-shaped steel sheet pile P3.

Therefore, the auxiliary clamp 7 is used to fix the steel pipe pile press-in/extraction machine 1 to the U-shaped steel sheet pile P2 or the H-shaped steel sheet pile P3. This auxiliary clamp 7 comprises a holding part 8c having the same shape as the clamp of a conventional pile press-in/extraction machine for U-shaped steel sheet piles, and a holding part 8c having the same inner and outer diameters as the steel pipe pile P1 on the upper part of the holding part 8c. , a gap G appropriately wider than the wall thickness of the U-shaped steel sheet pile P2 is formed, and a fixed claw 8a and a movable claw 8b configured at the tip of a fluid pressure cylinder are installed inside, and the movable claw 8b is moved by the cylinder. It moves forward and clamps the pile with the fixed claw 8a.

The operation of this embodiment configured as described above will be explained below.

When the steel pipe pile P1 is press-fitted into the ground, as shown in FIG. P1
Insert it. Then, with chuck 5b, steel pipe pile P
1, the chuck device 5 is lowered.
Thereby, the steel pipe pile P1 is press-fitted into the ground.

When the chuck device 5 moves to the lower end of the mast 4, the steel pipe pile P1 is released from the chuck device 5, only the chuck device 5 is raised, and the steel pipe pile P1 is held and lowered again to press-fit the steel pipe pile P1. By repeating this operation, the steel pipe pile P1 is press-fitted to a predetermined depth.

When press-fitting the U-shaped steel sheet pile P1, see Figure 1a.
As shown in FIG. 3, the U-shaped steel sheet pile attachment 10 is inserted into the cylindrical portion 5a of the chuck device 5 and held between the four chucks 5b. Then, the U-shaped steel sheet pile P2 is inserted into the insertion hole 12 of this attachment 10, and the piston 14 is operated to sandwich the U-shaped steel sheet pile P2 between the tip surface of the piston 14 and the inner wall surface of the insertion hole 12. In this state, as in the case of press-fitting steel pipe piles, the chuck device 5 is attached to the mast 4.
When the chuck device 5 moves to the lower end of the mast 4, the piston 14 is retracted and the U
The shaped steel sheet pile P2 is released and the holder 11 is raised together with the chuck device 5.

By repeating this operation, U-shaped steel sheet pile P2
Press into the ground. Further, the pulling operation is performed in the opposite order to the press-fitting operation.

In addition, when press-fitting the H-section steel P3, instead of the above-mentioned U-section steel sheet pile attachment 10, use the attachment shown in Fig. 1b.
As shown in FIG. 3, the attachment 20 for H-beam steel is attached to the chuck device 5,
4. Clamp the H-beam P3 with the extension.

The press-in and pull-out work for the H-section steel P3 is the same as that for the U-section steel sheet pile P2, and will therefore be omitted.

The piles P1 to P3 are press-fitted in this way, but when a pile of a different shape is press-fitted during the press-fitting, the following procedure is performed.

As shown in FIG. 3, when the existing pile P is a steel pipe pile P1 and the new press-in pile P is an H-beam P3 using the steel pipe pile press-in/extraction machine 1, the chuck device 5 is The attachment 20 for the shaped steel is installed as described above, and the clamp 6 can clamp the existing pile P1 as it is.

Next, as shown in FIG. 2, when the existing pile P is a U-shaped steel sheet pile P2 and the new press-in pile P is a steel pipe pile P1, the auxiliary clamp 7 shown in FIG. to grasp. This is done by inserting the clamp 6 into the holding portion 8c of the auxiliary clamp 7 and operating the cylinder 6d in the same manner as in the case of the steel pipe pile P1. Then, the upper end of the existing U-shaped steel sheet pile P2 is passed through the gap G between the fixed claw 8a and the movable claw 8b of the auxiliary clamp 7, and the piston is actuated to clamp the U-shaped steel sheet pile P2.

In this way, when continuously press-fitting the steel pipe pile P1, U-shaped steel sheet pile P2, and H-shaped steel sheet pile P3, attach the attachments 10 and 20 to the chuck device 5 as necessary, and attach the attachments 10 and 20 to the clamp 6 as necessary. The press fitting moves forward while attaching or removing the auxiliary clamp 7. Therefore, various types of steel piles can be continuously press-fitted quickly and easily.

In this example, the attachment for chuck devices for U-shaped steel sheet piles P2 and H-shaped steel P3 was explained, but by changing the shape of the insertion hole formed in the holder, it is possible to attach chuck devices for piles of other shapes. It can be an attachment.

(Effects of the invention) As explained above, according to the invention, piles other than steel pipe piles, such as U-shaped steel sheet piles and H-shaped steel sheets, can be pressed into the ground using a steel pipe pile press-in/extraction machine by simply replacing the attachments. can do.

Replacing the attachment is easier than replacing the pile press-in/extraction machine itself, so it is possible to shorten the work time and reduce construction costs.
In addition, you can easily press in and pull out piles while replacing steel pipe piles, U-shaped steel sheet piles, H-shaped steel, etc. as appropriate, so you can select the piles that suit the work site, making the work site safer. This has the effect of ensuring that

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG.
is a cross-sectional plan view of the first embodiment, FIG. 1b is a cross-sectional plan view of the second embodiment, FIG. 2 is a side view of a pile press-in and puller for press-fitting steel pipe piles, and FIG. 3 is a U-shaped steel A side view of a pile press-in/extraction machine for press-fitting sheet piles or H-beams; Figure 4 is a cross-sectional view taken along the - line in Figures 1a and b; Figures 5a and 5b are for steel pipe piles. FIG. 6 is a front sectional view of the clamp, FIG. 6 is a perspective view of the auxiliary clamp, and FIGS. 7 a to 7 c are plan views of the state in which various stakes are press-fitted while being replaced. 1...Pile press-in/extraction machine, 6...Clamp, 10...
...Attachment for U-shaped steel sheet piles, 13, 23...
Cylinder (auxiliary chuck device), 20... Attachment for H-shaped steel, P1... Steel pipe pile, P2... U-shaped steel sheet pile, P3... H-shaped steel.

Claims (1)

[Scope of Claim for Utility Model Registration] In a steel pipe pile press-in/extraction machine equipped with a chuck device capable of clamping steel pipe piles, a holder capable of clamping with the chuck device is equipped with an auxiliary chuck device capable of clamping piles other than steel pipe piles. An attachment for a chuck device of a steel pipe pile press-in/extraction machine.